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    <meta charset="UTF-8">
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    <title>Document</title>
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<body>
    <script>
        const arr = [{
            name: '张三',
            salary: 10000
        }, {
            name: '李四',
            salary: 10000
        }, {
            name: '王五',
            salary: 20000
        }]

        // 计算涨薪30%后，一共需要多支出多少
        const money = arr.reduce((pre, cur) => pre + cur.salary * .3, 0)
        console.log(money)
    </script>
</body>

</html>